Disable version check when running as a pre-commit hook (#2858)

As pre-commit itself has ability to upgrade to newer versions, we
disable version check by default when run under it.

src/ansiblelint/app.py

@@ -291,7 +291,9 @@ def report_summary(  # pylint: disable=too-many-branches,too-many-locals
             msg += f", and fixed {summary.fixed} issue(s)"
         msg += f" on {files_count} files."
 
-        if not self.options.offline:
+        # on offline mode and when run under pre-commit we do not want to
+        # check for updates.
+        if not self.options.offline and os.environ.get("PRE_COMMIT", "0") != "1":
             version_warning = get_version_warning()
             if version_warning:
                 msg += f"\n{version_warning}"